I don’t recall. I’ve pretty much always been involved in money-making pursuits, had my own lemonade stand when I was four. I started selling vegetables from our garden about that time. My mom would buy the initial supplies and I paid her back from the proceeds. A paycheck from an outside job really wasn’t a huge deal since I’ve basically always made my own money.
Though it was probably candy or some such.
Was that you? The guy with the red eyes trying to pry Jethro Tull’s Aqualung album out of my hands?
Awesome. Almost the same thing I did with my first summer job, only I bought a Yamaha soprano saxophone. I was 17.
V.J. Introduces The Beatles. The LP with the gatefold cover. It was $3.99.
I wish I still had it.
I bought a solid-pewter Zaima quartz ignition lighter. It never needed a battery and doubled nicely as a roll of dimes in case I ever had to throw a punch, but would never be taken away in a ‘frisk’. I also got a pewter hip-flask. (I was big into pewter back then…)
Time.
It kept the bookie off my back for another week. 
Well, I received my first paycheck in…god it had to be 1986, so it was either a Crowded House cassette tape or a David Bowie record album.
Lunch.
I bought a copy of the Zulu soundtrack for my Dad.
Employee discount, too. Awesome.
There were no pay cheques back in them thar days. My first pay was received in cold, hard cash in a buff coloured envelope. Gross, I earned $20 so net would have been a couple of dollars less. I paid $5 board to my mother, put aside $2.50 for the next week’s bus fares into Town (yikes, it costs more than that for a one way trip these days) and the rest I spent sensibly. On shoes.
Buy? what do you mean, buy? Buy as in “new things”?
Uy no, my first two paychecks went to the mechanic and body shop. That poor car was in worse shape than a 70yo whore who’d been working nonstop since she became legal…
I have very fond memories of spending my first paycheck earned by mowing lawns on a folding Buck knife and a cassette tape of Duran Duran’s Seven and the Ragged Tiger album. I still have the former; dunno what happened to the latter.
I can top that. I bought a Pong game.
I mean, hell, it was 1976. It was either that or Frampton Comes Alive. Come to think of it, maybe I should have gone with the Frampton.
My first regular job was postman during college summer vacation.
And the first check bought me some sturdier walking shoes!
I don’t remember the very first thing I bought–probably clothes. But when I got my first summer job, I used the money to take piano lessons. That was one of the smartest things I’ve ever done.
It was 1968. I was 15. I was making $1.50/hour. I think I bought a Hendrix album with part of it.
Burgers and pinball with the rest.
I can’t believe I’m the only one so far, who bought…
PIZZA!
My very first paycheck ever was for mowing lawns. I had a push-mower - the type with the whirling blades, no power except what you provided via your aching muscles. This was in Tucson, Arizona, against the evil Bermuda strain of grass that is so prevalent down there. After I was done mowing approximately two acres worth of jungle, I mean, lawn, I had to go back and rake it all into trash bags. The evil bastard who hired me then said I had to trim the edges, and provided me a pair of hedge clippers.
But I did it! And earned my first $10 ever, of which $9-plus went to Little Caesar’s Pizza because they were the cheapest place around.
Dammit, Grandpa, ya old coot… 
I don’t know for sure that it was with my first paycheck, but at my first job at a Target store when I was in high school I used my employee discount to splurge on a deluxe Scrabble game. It had the plastic board with a swivel base and a raised grid that held the tiles in place. While my wife and I were playing Scrabble last weekend I got to thinking that I’ve had that thing nearly thirty years now.
I was working in a card shop. I bought some Magic cards with it. Almost all of it, every day. (I got paid at the end of each day)
It was 1974, actually one of the very best years of my life so far…I was making $1.90 an hour as a laundromat attendant. I had a blue ‘69 Plymouth Satellite, and I smoked pot like a fiend. So no doubt I bought gasoline and weed with that very first check (my parents were kindly making the car payments at first, I didn’t contribute to those until a few months later). Second check was a sweet pair of denim gauchos with silver conch-shaped buttons, from which cascaded several strands of fringe down each wide leg. Damn, they looked hot on me! And a pair of bright red Dr. Scholls sandals with the wooden base. Stylin’-- that was me!
I miss my old Plymouth and my denim gauchos and my Dr. Scholls, but I DON"T miss making a buck ninety an hour!